There are plenty of Predator R/C models ready to be turned into proper UAVs, but where are the Global Hawks? One of the answers is that the full-size UAV is a jet, not a prop plane, so that complicates the power plant, and then there's the small matter of its huge wingspan and stumpy ("short-coupled") body, which doesn't bode well for stability.
No matter. I'm going to give it a go. There's a store in Singapore that's selling a pretty basic-looking foam one with a ducted fan, and I've ordered one. There's also one here (video below). If nothing else, they will give us a starting point for our CNC friends to make something better.